Brewster's Angle is the specific angle of incidence at which light with a particular polarization is perfectly transmitted through a transparent dielectric surface, such as glass or water, with no reflection. This angle is named after the Scottish physicist Sir David Brewster, who discovered it in the 19th century. At this angle, the reflected light is completely polarized perpendicular to the plane of incidence. The formula to calculate Brewster's Angle is given by the tangent of the angle being equal to the ratio of the refractive indices of the two media involved. This phenomenon is commonly utilized in photography and optics to reduce glare and enhance image quality.